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Hyundai CVVD engine brings another dimension to valve timing

A new technology from Hyundai Motor Group places another marker on the march to more efficient internal combustion engines. Called Continuously Variable Valve Duration, the innovation permits two options for how long the intake valves remain open during the combustion cycle. The feature adds a third take on valve chicanery, atop variable valve timing that changes when valves open, and variable valve lift that changes how far valves open. Hyundai says the feature returns a 4% improvement in performance, a 5% increase in fuel economy, and lowers emissions by 12%. Hyundai applied for two patents on the valvetrain process in South Korea in 2011 and again in 2015. The altered valve duration in this latest iteration is made possible by two movable arms inside the camshaft. Each arm is anchored at its base to a pin at the center of the camshaft, while the end of each arm extends toward the edge of the camshaft. Changing the position of the pin in the center of the camshaft changes the angle of the arms relative to one another, which moves the camshaft along its mounting rod. Voila, a new intake cam profile that either lengthens or shortens valve overlap.   During low-speed spells at low load, CVVD opens the intake valve from the middle to the end of compression stroke. The weaker detonation isn't a factor at low load, and the reduced friction during compression improves fuel economy. During heavy engine loads, the intake valve closes at the beginning of the compression stroke to maximize the amount of air mixed for detonation, boosting torque. Four additional features enhance the benefits of CVVD. A more powerful direct injection system increases fuel spray pressure from 250 bar to 350 bar. Hyundai doesn't go into details on its Integrated Thermal Management System, but says the ITMS "quickly heats or cools the engine to the optimal temperature." Low-friction components lower overall engine friction by 34 percent. And a low-pressure exhaust gas recirculation layout diverts low-pressure exhaust gas from the traditional EGR route to the turbocharger compressor under high load for better fuel efficiency.   The first engine to boast the new tech is the Smartstream G1.6 T-GDi four-cylinder, which produces 180 horsepower and 195 pound-feet of torque. It will appear in the 2020 Hyundai Sonata Turbo going on sale in South Korea later this year.

Hyundai and Kia recalling 1.6M more models for faulty brake switch

In what is likely the largest recall campaign for Hyundai and Kia, the National Highway Traffic Safety Administration has announced a recall of more than 1.6 million models due to a faulty brake switch. This is in addition to almost 700,000 Hyundai and Kia models recalled for the same problem back in 2009.
In more than 620,000 Kia models and 1 million Hyundai products for the 2007 through 2011 model years, the brake switch could malfunction causing the brake lights to not illuminate, which could lead to accident. Other possible issues with a faulty switch include the cruise control not cancelling with the brake pedal, the push-button starter not working properly and the shift interlock not disengaging causing the transmission to be stuck in Park. To fix the problem, the brake lights switch will be replaced.
Due to the large number of units being recalled, both automakers are issuing a notice by next month with parts not expected to be ready until June. The full list of affected vehicles and the NHTSA press releases are posted below.

Kia to show widebody custom Stinger at SEMA

Kia will take to the SEMA Show later this month with a modified version of its Stinger fastback sedan that it developed with West Coast Customs. This tuned version gets a number of high-performance enhancements, including a widened body, lowered front and rear suspension, gloss black front grille, carbon fiber aero kit, 21-inch forged wheels, widebody fender flares, rear diffuser and squared-off exhaust tips. The Stinger is a fastback sedan and the brand's first GT offering, inspired by the grand touring cars of the '60s and '70s, designed in Frankfurt and developed on the Nurburgring circuit. When it goes on sale in December, it'll come in a choice of two engines: a base 2.0-liter turbocharged four pushing out 255 horsepower and 260 pound-feet of torque, and a GT version with a 3.3-liter twin-turbo V6 generating 365 hp and 376 lb-ft that's also found in the Genesis G90. It also comes in rear- and all-wheel-drive configurations, with standard Nappa leather interior and plenty of passenger and cargo space. You can read our First Drive impressions of the GT version here. Kia also promises upgrades to the tuned Stinger's cockpit. It'll be unveiled Oct. 31 alongside two other custom Kia vehicles, with more news to come in the days ahead.Related Video: Featured Gallery Kia Stinger GT Widebody by West Coast Customs: SEMA 2017 View 9 Photos Image Credit: Copyright 2017 Drew Phillips / Autoblog.com SEMA Show Kia Sedan kia stinger gt west coast customs